<!doctype html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>js示例4-4-2</title>
	<script>
		var float1 = 32.12,  float2 = -38.00;
		alert(typeof 32.12);
		alert(typeof(float2));
	</script>
</head>
<body>
	
</body>
</html>